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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-08-27 14:13:33 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-08-27 14:13:33 (GMT) |
| commit | e372dc6c62bf0246a07f3291a26c562cc8659fbd (patch) | |
| tree | c7039c1d1005b80e427761ba768d7697ae4a0b72 /drivers/tty/serial/pmac_zilog.c | |
| parent | 5d4121c04b3577e37e389b3553d442f44bb346d7 (diff) | |
| parent | fea7a08acb13524b47711625eebea40a0ede69a0 (diff) | |
| download | linux-fsl-qoriq-e372dc6c62bf0246a07f3291a26c562cc8659fbd.tar.xz | |
Merge 3.6-rc3 into tty-next
This picks up all of the different fixes in Linus's tree that we also need here.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/pmac_zilog.c')
| -rw-r--r-- | drivers/tty/serial/pmac_zilog.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c index 654755a..333c8d0 100644 --- a/drivers/tty/serial/pmac_zilog.c +++ b/drivers/tty/serial/pmac_zilog.c @@ -1348,10 +1348,16 @@ static int pmz_verify_port(struct uart_port *port, struct serial_struct *ser) static int pmz_poll_get_char(struct uart_port *port) { struct uart_pmac_port *uap = (struct uart_pmac_port *)port; + int tries = 2; - while ((read_zsreg(uap, R0) & Rx_CH_AV) == 0) - udelay(5); - return read_zsdata(uap); + while (tries) { + if ((read_zsreg(uap, R0) & Rx_CH_AV) != 0) + return read_zsdata(uap); + if (tries--) + udelay(5); + } + + return NO_POLL_CHAR; } static void pmz_poll_put_char(struct uart_port *port, unsigned char c) |